A rare, severe birth defect is on the rise in an inbred polygamous community on the Arizona-Utah border. It is thought that the cause of the defect is intermarriage among close relatives who have two copies of a recessive gene for a debilitating condition called fumarase deficiency. The enzyme irregularity causes severe mental retardation, epileptic seizures and other effects that often leaves children unable to take care of themselves. Source:AP, azcentral.com. For the complete story, please click here (last visited February 11, 2006, reo.)